package org.bouncycastle.tls.crypto;

import java.math.BigInteger;

import org.bouncycastle.util.encoders.Hex;

/**
 * Standard Diffie-Hellman groups from various IETF specifications.
 */
public class DHStandardGroups
{
    private static final BigInteger TWO = BigInteger.valueOf(2);

    private static BigInteger fromHex(String hex)
    {
        return new BigInteger(1, Hex.decodeStrict(hex));
    }

//    private static DHGroup fromPG(String hexP, String hexG)
//    {
//        return new DHGroup(fromHex(hexP), null, fromHex(hexG), 0);
//    }

    private static DHGroup safePrimeGen2(String hexP)
    {
        return safePrimeGen2(hexP, 0);
    }

    private static DHGroup safePrimeGen2(String hexP, int l)
    {
        // NOTE: A group using a safe prime (i.e. q = (p-1)/2), and generator g = 2
        BigInteger p = fromHex(hexP);
        return new DHGroup(p, p.shiftRight(1), TWO, l);
    }

    /*
     * RFC 2409
     */
    private static final String rfc2409_768_p = "FFFFFFFFFFFFFFFFC90FDAA22168C234C4C6628B80DC1CD1"
        + "29024E088A67CC74020BBEA63B139B22514A08798E3404DD" + "EF9519B3CD3A431B302B0A6DF25F14374FE1356D6D51C245"
        + "E485B576625E7EC6F44C42E9A63A3620FFFFFFFFFFFFFFFF";
    public static final DHGroup rfc2409_768 = safePrimeGen2(rfc2409_768_p);

    private static final String rfc2409_1024_p = "FFFFFFFFFFFFFFFFC90FDAA22168C234C4C6628B80DC1CD1"
        + "29024E088A67CC74020BBEA63B139B22514A08798E3404DD" + "EF9519B3CD3A431B302B0A6DF25F14374FE1356D6D51C245"
        + "E485B576625E7EC6F44C42E9A637ED6B0BFF5CB6F406B7ED" + "EE386BFB5A899FA5AE9F24117C4B1FE649286651ECE65381"
        + "FFFFFFFFFFFFFFFF";
    public static final DHGroup rfc2409_1024 = safePrimeGen2(rfc2409_1024_p);

    /*
     * RFC 3526
     */
    private static final String rfc3526_1536_p = "FFFFFFFFFFFFFFFFC90FDAA22168C234C4C6628B80DC1CD1"
        + "29024E088A67CC74020BBEA63B139B22514A08798E3404DD" + "EF9519B3CD3A431B302B0A6DF25F14374FE1356D6D51C245"
        + "E485B576625E7EC6F44C42E9A637ED6B0BFF5CB6F406B7ED" + "EE386BFB5A899FA5AE9F24117C4B1FE649286651ECE45B3D"
        + "C2007CB8A163BF0598DA48361C55D39A69163FA8FD24CF5F" + "83655D23DCA3AD961C62F356208552BB9ED529077096966D"
        + "670C354E4ABC9804F1746C08CA237327FFFFFFFFFFFFFFFF";
    private static final int rfc3526_1536_l = 200; // RFC3526/RFC7919
    public static final DHGroup rfc3526_1536 = safePrimeGen2(rfc3526_1536_p, rfc3526_1536_l);

    private static final String rfc3526_2048_p = "FFFFFFFFFFFFFFFFC90FDAA22168C234C4C6628B80DC1CD1"
        + "29024E088A67CC74020BBEA63B139B22514A08798E3404DD" + "EF9519B3CD3A431B302B0A6DF25F14374FE1356D6D51C245"
        + "E485B576625E7EC6F44C42E9A637ED6B0BFF5CB6F406B7ED" + "EE386BFB5A899FA5AE9F24117C4B1FE649286651ECE45B3D"
        + "C2007CB8A163BF0598DA48361C55D39A69163FA8FD24CF5F" + "83655D23DCA3AD961C62F356208552BB9ED529077096966D"
        + "670C354E4ABC9804F1746C08CA18217C32905E462E36CE3B" + "E39E772C180E86039B2783A2EC07A28FB5C55DF06F4C52C9"
        + "DE2BCBF6955817183995497CEA956AE515D2261898FA0510" + "15728E5A8AACAA68FFFFFFFFFFFFFFFF";
    private static final int rfc3526_2048_l = Math.max(225, 112 * 2); // MAX(RFC3526/RFC7919,FIPS)
    public static final DHGroup rfc3526_2048 = safePrimeGen2(rfc3526_2048_p, rfc3526_2048_l);

    private static final String rfc3526_3072_p = "FFFFFFFFFFFFFFFFC90FDAA22168C234C4C6628B80DC1CD1"
        + "29024E088A67CC74020BBEA63B139B22514A08798E3404DD" + "EF9519B3CD3A431B302B0A6DF25F14374FE1356D6D51C245"
        + "E485B576625E7EC6F44C42E9A637ED6B0BFF5CB6F406B7ED" + "EE386BFB5A899FA5AE9F24117C4B1FE649286651ECE45B3D"
        + "C2007CB8A163BF0598DA48361C55D39A69163FA8FD24CF5F" + "83655D23DCA3AD961C62F356208552BB9ED529077096966D"
        + "670C354E4ABC9804F1746C08CA18217C32905E462E36CE3B" + "E39E772C180E86039B2783A2EC07A28FB5C55DF06F4C52C9"
        + "DE2BCBF6955817183995497CEA956AE515D2261898FA0510" + "15728E5A8AAAC42DAD33170D04507A33A85521ABDF1CBA64"
        + "ECFB850458DBEF0A8AEA71575D060C7DB3970F85A6E1E4C7" + "ABF5AE8CDB0933D71E8C94E04A25619DCEE3D2261AD2EE6B"
        + "F12FFA06D98A0864D87602733EC86A64521F2B18177B200C" + "BBE117577A615D6C770988C0BAD946E208E24FA074E5AB31"
        + "43DB5BFCE0FD108E4B82D120A93AD2CAFFFFFFFFFFFFFFFF";
    private static final int rfc3526_3072_l = Math.max(275, 128 * 2); // MAX(RFC3526/RFC7919,FIPS)
    public static final DHGroup rfc3526_3072 = safePrimeGen2(rfc3526_3072_p, rfc3526_3072_l);

    private static final String rfc3526_4096_p = "FFFFFFFFFFFFFFFFC90FDAA22168C234C4C6628B80DC1CD1"
        + "29024E088A67CC74020BBEA63B139B22514A08798E3404DD" + "EF9519B3CD3A431B302B0A6DF25F14374FE1356D6D51C245"
        + "E485B576625E7EC6F44C42E9A637ED6B0BFF5CB6F406B7ED" + "EE386BFB5A899FA5AE9F24117C4B1FE649286651ECE45B3D"
        + "C2007CB8A163BF0598DA48361C55D39A69163FA8FD24CF5F" + "83655D23DCA3AD961C62F356208552BB9ED529077096966D"
        + "670C354E4ABC9804F1746C08CA18217C32905E462E36CE3B" + "E39E772C180E86039B2783A2EC07A28FB5C55DF06F4C52C9"
        + "DE2BCBF6955817183995497CEA956AE515D2261898FA0510" + "15728E5A8AAAC42DAD33170D04507A33A85521ABDF1CBA64"
        + "ECFB850458DBEF0A8AEA71575D060C7DB3970F85A6E1E4C7" + "ABF5AE8CDB0933D71E8C94E04A25619DCEE3D2261AD2EE6B"
        + "F12FFA06D98A0864D87602733EC86A64521F2B18177B200C" + "BBE117577A615D6C770988C0BAD946E208E24FA074E5AB31"
        + "43DB5BFCE0FD108E4B82D120A92108011A723C12A787E6D7" + "88719A10BDBA5B2699C327186AF4E23C1A946834B6150BDA"
        + "2583E9CA2AD44CE8DBBBC2DB04DE8EF92E8EFC141FBECAA6" + "287C59474E6BC05D99B2964FA090C3A2233BA186515BE7ED"
        + "1F612970CEE2D7AFB81BDD762170481CD0069127D5B05AA9" + "93B4EA988D8FDDC186FFB7DC90A6C08F4DF435C934063199"
        + "FFFFFFFFFFFFFFFF";
    private static final int rfc3526_4096_l = Math.max(325, 152 * 2); // MAX(RFC3526/RFC7919,FIPS)
    public static final DHGroup rfc3526_4096 = safePrimeGen2(rfc3526_4096_p, rfc3526_4096_l);

    private static final String rfc3526_6144_p = "FFFFFFFFFFFFFFFFC90FDAA22168C234C4C6628B80DC1CD129024E08"
        + "8A67CC74020BBEA63B139B22514A08798E3404DDEF9519B3CD3A431B"
        + "302B0A6DF25F14374FE1356D6D51C245E485B576625E7EC6F44C42E9"
        + "A637ED6B0BFF5CB6F406B7EDEE386BFB5A899FA5AE9F24117C4B1FE6"
        + "49286651ECE45B3DC2007CB8A163BF0598DA48361C55D39A69163FA8"
        + "FD24CF5F83655D23DCA3AD961C62F356208552BB9ED529077096966D"
        + "670C354E4ABC9804F1746C08CA18217C32905E462E36CE3BE39E772C"
        + "180E86039B2783A2EC07A28FB5C55DF06F4C52C9DE2BCBF695581718"
        + "3995497CEA956AE515D2261898FA051015728E5A8AAAC42DAD33170D"
        + "04507A33A85521ABDF1CBA64ECFB850458DBEF0A8AEA71575D060C7D"
        + "B3970F85A6E1E4C7ABF5AE8CDB0933D71E8C94E04A25619DCEE3D226"
        + "1AD2EE6BF12FFA06D98A0864D87602733EC86A64521F2B18177B200C"
        + "BBE117577A615D6C770988C0BAD946E208E24FA074E5AB3143DB5BFC"
        + "E0FD108E4B82D120A92108011A723C12A787E6D788719A10BDBA5B26"
        + "99C327186AF4E23C1A946834B6150BDA2583E9CA2AD44CE8DBBBC2DB"
        + "04DE8EF92E8EFC141FBECAA6287C59474E6BC05D99B2964FA090C3A2"
        + "233BA186515BE7ED1F612970CEE2D7AFB81BDD762170481CD0069127"
        + "D5B05AA993B4EA988D8FDDC186FFB7DC90A6C08F4DF435C934028492"
        + "36C3FAB4D27C7026C1D4DCB2602646DEC9751E763DBA37BDF8FF9406"
        + "AD9E530EE5DB382F413001AEB06A53ED9027D831179727B0865A8918"
        + "DA3EDBEBCF9B14ED44CE6CBACED4BB1BDB7F1447E6CC254B33205151"
        + "2BD7AF426FB8F401378CD2BF5983CA01C64B92ECF032EA15D1721D03"
        + "F482D7CE6E74FEF6D55E702F46980C82B5A84031900B1C9E59E7C97F"
        + "BEC7E8F323A97A7E36CC88BE0F1D45B7FF585AC54BD407B22B4154AA"
        + "CC8F6D7EBF48E1D814CC5ED20F8037E0A79715EEF29BE32806A1D58B"
        + "B7C5DA76F550AA3D8A1FBFF0EB19CCB1A313D55CDA56C9EC2EF29632"
        + "387FE8D76E3C0468043E8F663F4860EE12BF2D5B0B7474D6E694F91E"
        + "6DCC4024FFFFFFFFFFFFFFFF";
    private static final int rfc3526_6144_l = Math.max(375, 176 * 2); // MAX(RFC3526/RFC7919,FIPS)
    public static final DHGroup rfc3526_6144 = safePrimeGen2(rfc3526_6144_p, rfc3526_6144_l);

    private static final String rfc3526_8192_p = "FFFFFFFFFFFFFFFFC90FDAA22168C234C4C6628B80DC1CD1"
        + "29024E088A67CC74020BBEA63B139B22514A08798E3404DD" + "EF9519B3CD3A431B302B0A6DF25F14374FE1356D6D51C245"
        + "E485B576625E7EC6F44C42E9A637ED6B0BFF5CB6F406B7ED" + "EE386BFB5A899FA5AE9F24117C4B1FE649286651ECE45B3D"
        + "C2007CB8A163BF0598DA48361C55D39A69163FA8FD24CF5F" + "83655D23DCA3AD961C62F356208552BB9ED529077096966D"
        + "670C354E4ABC9804F1746C08CA18217C32905E462E36CE3B" + "E39E772C180E86039B2783A2EC07A28FB5C55DF06F4C52C9"
        + "DE2BCBF6955817183995497CEA956AE515D2261898FA0510" + "15728E5A8AAAC42DAD33170D04507A33A85521ABDF1CBA64"
        + "ECFB850458DBEF0A8AEA71575D060C7DB3970F85A6E1E4C7" + "ABF5AE8CDB0933D71E8C94E04A25619DCEE3D2261AD2EE6B"
        + "F12FFA06D98A0864D87602733EC86A64521F2B18177B200C" + "BBE117577A615D6C770988C0BAD946E208E24FA074E5AB31"
        + "43DB5BFCE0FD108E4B82D120A92108011A723C12A787E6D7" + "88719A10BDBA5B2699C327186AF4E23C1A946834B6150BDA"
        + "2583E9CA2AD44CE8DBBBC2DB04DE8EF92E8EFC141FBECAA6" + "287C59474E6BC05D99B2964FA090C3A2233BA186515BE7ED"
        + "1F612970CEE2D7AFB81BDD762170481CD0069127D5B05AA9" + "93B4EA988D8FDDC186FFB7DC90A6C08F4DF435C934028492"
        + "36C3FAB4D27C7026C1D4DCB2602646DEC9751E763DBA37BD" + "F8FF9406AD9E530EE5DB382F413001AEB06A53ED9027D831"
        + "179727B0865A8918DA3EDBEBCF9B14ED44CE6CBACED4BB1B" + "DB7F1447E6CC254B332051512BD7AF426FB8F401378CD2BF"
        + "5983CA01C64B92ECF032EA15D1721D03F482D7CE6E74FEF6" + "D55E702F46980C82B5A84031900B1C9E59E7C97FBEC7E8F3"
        + "23A97A7E36CC88BE0F1D45B7FF585AC54BD407B22B4154AA" + "CC8F6D7EBF48E1D814CC5ED20F8037E0A79715EEF29BE328"
        + "06A1D58BB7C5DA76F550AA3D8A1FBFF0EB19CCB1A313D55C" + "DA56C9EC2EF29632387FE8D76E3C0468043E8F663F4860EE"
        + "12BF2D5B0B7474D6E694F91E6DBE115974A3926F12FEE5E4" + "38777CB6A932DF8CD8BEC4D073B931BA3BC832B68D9DD300"
        + "741FA7BF8AFC47ED2576F6936BA424663AAB639C5AE4F568" + "3423B4742BF1C978238F16CBE39D652DE3FDB8BEFC848AD9"
        + "22222E04A4037C0713EB57A81A23F0C73473FC646CEA306B" + "4BCBC8862F8385DDFA9D4B7FA2C087E879683303ED5BDD3A"
        + "062B3CF5B3A278A66D2A13F83F44F82DDF310EE074AB6A36" + "4597E899A0255DC164F31CC50846851DF9AB48195DED7EA1"
        + "B1D510BD7EE74D73FAF36BC31ECFA268359046F4EB879F92" + "4009438B481C6CD7889A002ED5EE382BC9190DA6FC026E47"
        + "9558E4475677E9AA9E3050E2765694DFC81F56E880B96E71" + "60C980DD98EDD3DFFFFFFFFFFFFFFFFF";
    private static final int rfc3526_8192_l = Math.max(400, 200 * 2); // MAX(RFC3526/RFC7919,FIPS)
    public static final DHGroup rfc3526_8192 = safePrimeGen2(rfc3526_8192_p, rfc3526_8192_l);

    /*
     * RFC 4306
     */
    public static final DHGroup rfc4306_768 = rfc2409_768;
    public static final DHGroup rfc4306_1024 = rfc2409_1024;

    /*
     * RFC 5996
     */
    public static final DHGroup rfc5996_768 = rfc4306_768;
    public static final DHGroup rfc5996_1024 = rfc4306_1024;

    /*
     * RFC 7919
     */
    private static final String rfc7919_ffdhe2048_p = "FFFFFFFFFFFFFFFFADF85458A2BB4A9AAFDC5620273D3CF1"
        + "D8B9C583CE2D3695A9E13641146433FBCC939DCE249B3EF9" + "7D2FE363630C75D8F681B202AEC4617AD3DF1ED5D5FD6561"
        + "2433F51F5F066ED0856365553DED1AF3B557135E7F57C935" + "984F0C70E0E68B77E2A689DAF3EFE8721DF158A136ADE735"
        + "30ACCA4F483A797ABC0AB182B324FB61D108A94BB2C8E3FB" + "B96ADAB760D7F4681D4F42A3DE394DF4AE56EDE76372BB19"
        + "0B07A7C8EE0A6D709E02FCE1CDF7E2ECC03404CD28342F61" + "9172FE9CE98583FF8E4F1232EEF28183C3FE3B1B4C6FAD73"
        + "3BB5FCBC2EC22005C58EF1837D1683B2C6F34A26C1B2EFFA" + "886B423861285C97FFFFFFFFFFFFFFFF";
    private static final int rfc7919_ffdhe2048_l = Math.max(225, 112 * 2); // MAX(RFC7919,FIPS)
    public static final DHGroup rfc7919_ffdhe2048 = safePrimeGen2(rfc7919_ffdhe2048_p, rfc7919_ffdhe2048_l);

    private static final String rfc7919_ffdhe3072_p = "FFFFFFFFFFFFFFFFADF85458A2BB4A9AAFDC5620273D3CF1"
        + "D8B9C583CE2D3695A9E13641146433FBCC939DCE249B3EF9" + "7D2FE363630C75D8F681B202AEC4617AD3DF1ED5D5FD6561"
        + "2433F51F5F066ED0856365553DED1AF3B557135E7F57C935" + "984F0C70E0E68B77E2A689DAF3EFE8721DF158A136ADE735"
        + "30ACCA4F483A797ABC0AB182B324FB61D108A94BB2C8E3FB" + "B96ADAB760D7F4681D4F42A3DE394DF4AE56EDE76372BB19"
        + "0B07A7C8EE0A6D709E02FCE1CDF7E2ECC03404CD28342F61" + "9172FE9CE98583FF8E4F1232EEF28183C3FE3B1B4C6FAD73"
        + "3BB5FCBC2EC22005C58EF1837D1683B2C6F34A26C1B2EFFA" + "886B4238611FCFDCDE355B3B6519035BBC34F4DEF99C0238"
        + "61B46FC9D6E6C9077AD91D2691F7F7EE598CB0FAC186D91C" + "AEFE130985139270B4130C93BC437944F4FD4452E2D74DD3"
        + "64F2E21E71F54BFF5CAE82AB9C9DF69EE86D2BC522363A0D" + "ABC521979B0DEADA1DBF9A42D5C4484E0ABCD06BFA53DDEF"
        + "3C1B20EE3FD59D7C25E41D2B66C62E37FFFFFFFFFFFFFFFF";
    private static final int rfc7919_ffdhe3072_l = Math.max(275, 128 * 2); // MAX(RFC7919,FIPS)
    public static final DHGroup rfc7919_ffdhe3072 = safePrimeGen2(rfc7919_ffdhe3072_p, rfc7919_ffdhe3072_l);

    private static final String rfc7919_ffdhe4096_p = "FFFFFFFFFFFFFFFFADF85458A2BB4A9AAFDC5620273D3CF1"
        + "D8B9C583CE2D3695A9E13641146433FBCC939DCE249B3EF9" + "7D2FE363630C75D8F681B202AEC4617AD3DF1ED5D5FD6561"
        + "2433F51F5F066ED0856365553DED1AF3B557135E7F57C935" + "984F0C70E0E68B77E2A689DAF3EFE8721DF158A136ADE735"
        + "30ACCA4F483A797ABC0AB182B324FB61D108A94BB2C8E3FB" + "B96ADAB760D7F4681D4F42A3DE394DF4AE56EDE76372BB19"
        + "0B07A7C8EE0A6D709E02FCE1CDF7E2ECC03404CD28342F61" + "9172FE9CE98583FF8E4F1232EEF28183C3FE3B1B4C6FAD73"
        + "3BB5FCBC2EC22005C58EF1837D1683B2C6F34A26C1B2EFFA" + "886B4238611FCFDCDE355B3B6519035BBC34F4DEF99C0238"
        + "61B46FC9D6E6C9077AD91D2691F7F7EE598CB0FAC186D91C" + "AEFE130985139270B4130C93BC437944F4FD4452E2D74DD3"
        + "64F2E21E71F54BFF5CAE82AB9C9DF69EE86D2BC522363A0D" + "ABC521979B0DEADA1DBF9A42D5C4484E0ABCD06BFA53DDEF"
        + "3C1B20EE3FD59D7C25E41D2B669E1EF16E6F52C3164DF4FB" + "7930E9E4E58857B6AC7D5F42D69F6D187763CF1D55034004"
        + "87F55BA57E31CC7A7135C886EFB4318AED6A1E012D9E6832" + "A907600A918130C46DC778F971AD0038092999A333CB8B7A"
        + "1A1DB93D7140003C2A4ECEA9F98D0ACC0A8291CDCEC97DCF" + "8EC9B55A7F88A46B4DB5A851F44182E1C68A007E5E655F6A"
        + "FFFFFFFFFFFFFFFF";
    private static final int rfc7919_ffdhe4096_l = Math.max(325, 152 * 2); // MAX(RFC7919,FIPS)
    public static final DHGroup rfc7919_ffdhe4096 = safePrimeGen2(rfc7919_ffdhe4096_p, rfc7919_ffdhe4096_l);

    private static final String rfc7919_ffdhe6144_p = "FFFFFFFFFFFFFFFFADF85458A2BB4A9AAFDC5620273D3CF1"
        + "D8B9C583CE2D3695A9E13641146433FBCC939DCE249B3EF9" + "7D2FE363630C75D8F681B202AEC4617AD3DF1ED5D5FD6561"
        + "2433F51F5F066ED0856365553DED1AF3B557135E7F57C935" + "984F0C70E0E68B77E2A689DAF3EFE8721DF158A136ADE735"
        + "30ACCA4F483A797ABC0AB182B324FB61D108A94BB2C8E3FB" + "B96ADAB760D7F4681D4F42A3DE394DF4AE56EDE76372BB19"
        + "0B07A7C8EE0A6D709E02FCE1CDF7E2ECC03404CD28342F61" + "9172FE9CE98583FF8E4F1232EEF28183C3FE3B1B4C6FAD73"
        + "3BB5FCBC2EC22005C58EF1837D1683B2C6F34A26C1B2EFFA" + "886B4238611FCFDCDE355B3B6519035BBC34F4DEF99C0238"
        + "61B46FC9D6E6C9077AD91D2691F7F7EE598CB0FAC186D91C" + "AEFE130985139270B4130C93BC437944F4FD4452E2D74DD3"
        + "64F2E21E71F54BFF5CAE82AB9C9DF69EE86D2BC522363A0D" + "ABC521979B0DEADA1DBF9A42D5C4484E0ABCD06BFA53DDEF"
        + "3C1B20EE3FD59D7C25E41D2B669E1EF16E6F52C3164DF4FB" + "7930E9E4E58857B6AC7D5F42D69F6D187763CF1D55034004"
        + "87F55BA57E31CC7A7135C886EFB4318AED6A1E012D9E6832" + "A907600A918130C46DC778F971AD0038092999A333CB8B7A"
        + "1A1DB93D7140003C2A4ECEA9F98D0ACC0A8291CDCEC97DCF" + "8EC9B55A7F88A46B4DB5A851F44182E1C68A007E5E0DD902"
        + "0BFD64B645036C7A4E677D2C38532A3A23BA4442CAF53EA6" + "3BB454329B7624C8917BDD64B1C0FD4CB38E8C334C701C3A"
        + "CDAD0657FCCFEC719B1F5C3E4E46041F388147FB4CFDB477" + "A52471F7A9A96910B855322EDB6340D8A00EF092350511E3"
        + "0ABEC1FFF9E3A26E7FB29F8C183023C3587E38DA0077D9B4" + "763E4E4B94B2BBC194C6651E77CAF992EEAAC0232A281BF6"
        + "B3A739C1226116820AE8DB5847A67CBEF9C9091B462D538C" + "D72B03746AE77F5E62292C311562A846505DC82DB854338A"
        + "E49F5235C95B91178CCF2DD5CACEF403EC9D1810C6272B04" + "5B3B71F9DC6B80D63FDD4A8E9ADB1E6962A69526D43161C1"
        + "A41D570D7938DAD4A40E329CD0E40E65FFFFFFFFFFFFFFFF";
    private static final int rfc7919_ffdhe6144_l = Math.max(375, 176 * 2); // MAX(RFC7919,FIPS)
    public static final DHGroup rfc7919_ffdhe6144 = safePrimeGen2(rfc7919_ffdhe6144_p, rfc7919_ffdhe6144_l);

    private static final String rfc7919_ffdhe8192_p = "FFFFFFFFFFFFFFFFADF85458A2BB4A9AAFDC5620273D3CF1"
        + "D8B9C583CE2D3695A9E13641146433FBCC939DCE249B3EF9" + "7D2FE363630C75D8F681B202AEC4617AD3DF1ED5D5FD6561"
        + "2433F51F5F066ED0856365553DED1AF3B557135E7F57C935" + "984F0C70E0E68B77E2A689DAF3EFE8721DF158A136ADE735"
        + "30ACCA4F483A797ABC0AB182B324FB61D108A94BB2C8E3FB" + "B96ADAB760D7F4681D4F42A3DE394DF4AE56EDE76372BB19"
        + "0B07A7C8EE0A6D709E02FCE1CDF7E2ECC03404CD28342F61" + "9172FE9CE98583FF8E4F1232EEF28183C3FE3B1B4C6FAD73"
        + "3BB5FCBC2EC22005C58EF1837D1683B2C6F34A26C1B2EFFA" + "886B4238611FCFDCDE355B3B6519035BBC34F4DEF99C0238"
        + "61B46FC9D6E6C9077AD91D2691F7F7EE598CB0FAC186D91C" + "AEFE130985139270B4130C93BC437944F4FD4452E2D74DD3"
        + "64F2E21E71F54BFF5CAE82AB9C9DF69EE86D2BC522363A0D" + "ABC521979B0DEADA1DBF9A42D5C4484E0ABCD06BFA53DDEF"
        + "3C1B20EE3FD59D7C25E41D2B669E1EF16E6F52C3164DF4FB" + "7930E9E4E58857B6AC7D5F42D69F6D187763CF1D55034004"
        + "87F55BA57E31CC7A7135C886EFB4318AED6A1E012D9E6832" + "A907600A918130C46DC778F971AD0038092999A333CB8B7A"
        + "1A1DB93D7140003C2A4ECEA9F98D0ACC0A8291CDCEC97DCF" + "8EC9B55A7F88A46B4DB5A851F44182E1C68A007E5E0DD902"
        + "0BFD64B645036C7A4E677D2C38532A3A23BA4442CAF53EA6" + "3BB454329B7624C8917BDD64B1C0FD4CB38E8C334C701C3A"
        + "CDAD0657FCCFEC719B1F5C3E4E46041F388147FB4CFDB477" + "A52471F7A9A96910B855322EDB6340D8A00EF092350511E3"
        + "0ABEC1FFF9E3A26E7FB29F8C183023C3587E38DA0077D9B4" + "763E4E4B94B2BBC194C6651E77CAF992EEAAC0232A281BF6"
        + "B3A739C1226116820AE8DB5847A67CBEF9C9091B462D538C" + "D72B03746AE77F5E62292C311562A846505DC82DB854338A"
        + "E49F5235C95B91178CCF2DD5CACEF403EC9D1810C6272B04" + "5B3B71F9DC6B80D63FDD4A8E9ADB1E6962A69526D43161C1"
        + "A41D570D7938DAD4A40E329CCFF46AAA36AD004CF600C838" + "1E425A31D951AE64FDB23FCEC9509D43687FEB69EDD1CC5E"
        + "0B8CC3BDF64B10EF86B63142A3AB8829555B2F747C932665" + "CB2C0F1CC01BD70229388839D2AF05E454504AC78B758282"
        + "2846C0BA35C35F5C59160CC046FD8251541FC68C9C86B022" + "BB7099876A460E7451A8A93109703FEE1C217E6C3826E52C"
        + "51AA691E0E423CFC99E9E31650C1217B624816CDAD9A95F9" + "D5B8019488D9C0A0A1FE3075A577E23183F81D4A3F2FA457"
        + "1EFC8CE0BA8A4FE8B6855DFE72B0A66EDED2FBABFBE58A30" + "FAFABE1C5D71A87E2F741EF8C1FE86FEA6BBFDE530677F0D"
        + "97D11D49F7A8443D0822E506A9F4614E011E2A94838FF88C" + "D68C8BB7C5C6424CFFFFFFFFFFFFFFFF";
    private static final int rfc7919_ffdhe8192_l = Math.max(400, 200 * 2); // MAX(RFC7919,FIPS)
    public static final DHGroup rfc7919_ffdhe8192 = safePrimeGen2(rfc7919_ffdhe8192_p, rfc7919_ffdhe8192_l);
}
